Suction box for paper-making machines



J. G. JONES SUCTION BOX FOR PAPER MAKING MACHINES Feb. 9, 1926. 1,572,238

Filed Feb. 12, 1924 5 6 ..5 1" '7 4-ZZ0Z9 F1 .5. FI|% E 1 25 l A 2 ii 15 :t 1%; 2516 Z5 Z7 22 2 B 2 Z 21 5 l1 1 17 2 A Ki 1 +5 l L 7 r r' --r F a Z 7 Z910 7.22.

' LZFI i n r I 9 2 ATTORNEYS.

Patented F eb. 9,1926.

UNITE STATES i PATE N'll, oFFicE.

some o. JONES, or aocnns'rna, New YORK, ssmnon cromsrman KODAK comrm, or nocnns raa, new. YORK, A. coaroaa'rxon or new YORK.

SUCTION BOX FOR PIPER- MAKING MACEINES. I

V Applicationfiled fe'bi'uary 12, 1924'. Serial No. t92,430.

and State of Ncw York, have invented cer-.

tain' new and useful Improvementsin Sue tion Boxes for Paper-Making Machines, of

which the following is a full, clear, and ex-- act specification. lll

over which the Fourdrinier wire withthe paper stock is drawn for dehydration. One ob ect is toprovide a suction box which will supportthe wire screen upon an anti-trim.

vtion device throughout its entire area as it passes overthe box, thus materially lengthening the life or the screen. Another object is to eliate the usual scraping of the screen upon the suction box, particularly at the points where it comes upon and leaves the suction box. Another object is to provide a uniform suction throughout the area of screen supported upon the rollers. An-

other object is to support the roller bearings at intervals throng other object is to reduce thefriction' upon the screen by supporting it upon the suction box on rollers which are driven at a peripheral speed equal to the speed of the screen. Other objects will a pearhereinafter from the specification, t e novel features being end thereof. I

Fig. l is a plan view of a suction box con structed in accordance with and illustrating one form of my device, the Fourdrinier screen being shown over a portion of the box;

pointed out in the claims at the t ll intermeshing rollers used in my device;

Fig. 3 is an enlarged fragmentary section showing the intermeshing rollers and roller su ports;

. Fig. 4 is a section taken through a portion of the suction box, showing another view of the rollers and roller supports, and

Fig. 5 is a section on line 55 of Fig. 1.

la the present embodiment of my inven- This inventionrelates to paper making machines and particularly to suction boxes out their length. An

Fig. 2 is an enlarged detail plan view of.

tion there is a box 10f rectangular shape having side and end walls 2 and 3, a bot tom 4 and an 0 on top 5 across the ends of provide rollers 10 which are mounted in grooves 41 cut in strips ,7. These. roll-. ers are carried by shafts 11 to which gears 12 are attached to be rotated through a power driven chain 13. Both rollers are,

which extend anges 6, these'fianges being therefore, driven to ether at the same speed, s

which is that at which the Fourdrinier wire screen 14 is moved. I

Parallel to, shafts 11 are a series of shafts 15 driven by sprockets 16 and 16' which are preferably alternately arranged with sprockets 16 on one side and 16' on the other. This is done for the sake of proper clearance. s On these shafts are mounted a series of rollers, preferably of two diameters alternately arranged, with the large rollers 17 spaced by the small rollers 18. These two rollers may be integral, as shown in Fig. 2 at A, although I prefer to make them separate, as shown at It n the same figure. The large rollers 17 are mounted to turn with shafts- 15, as by attaching by ins 18' Since; rollers 10 and 1 are all power driven at the speed with which the wire screen moves, friction between the. screen and box is practically eliminated. The screen con tacts with the box only along the flanges 6, and the movement of -the screen to thesev flanges is caused by rollers 10 which raises the screen to the level of flanges 6 which, as shown in Fig. 5, are in aslightly higher plane than strips 7. The screen does not touch stri s or the incline 9 connecting the strips an flanges.

Some paper webs are relativelywide and i it is conseuentl preferable to sup ort the rollers an sha s between the en s. For

this purpose I provide a support 20 having arms 21 extending upwar ly therefrom, each arm having a curved seat 22 of such a radius that it may engage and support a '8V8Ill distributed over the entire area.

small roller 18. I find it convenient to stagger these arms, as indicated in Fig. 4, and the number of these supportsflis determined by the width of the suction box.

As can be seen from Fig. 2, the rollers do not fit tightly together in: their inter meshing engagement, but'have openingsor interstices 23 in between. Thiscprovides for the suction which draws air and moisture through the screen, and by the even pattern formed by the rollers the suction if find-1t advisable to vary the width of the suction box according to the width of the paper web WV formed between the decker straps D. -With this system there is a water seal along flanges 6, and rollers 10, thus causing the moisture to be drawn evenly from the entire suction area. The rollers 17 not-only support the wire in a plane and provide an anti-friction hearing, but in" addition tend to subdivide the suction area into aplurality of'small areas from which moisture can be evenly drawn.

Although I have shown a preferred em- -bodiment of my' invention in the drawing,

tween the r01 obviously numerous changes'may be made therefrom without departing from my invention. I desire to mclude as within the scope of my invention all such changes as may come within the terms of the following claims.

Having thus described my invention, What I claim as new and desire to secure by- Let-- ters Patent is: 1

1. In a paper making machine, the combination with a wire screen, of a suction box over which the screen may be drawn, having a suction area including a plurality of overlapping-rollers with interstices be ers, whereby the screen may be su ported by the rollers as the suction acts is rough the interstices and screen to draw moisture from a paper web being formed on the screen.

2.'In a paper making machine, the combination with a wire screen,'of a suction box over which the screen may be drawn, having a suction area including a plurality of overla ping rollers with interstices between the rollers, and means to turn the rollers by ower, whereby the screen will be supported y the rbl'lers -and"will move fr ely thereover as moisture is drawn from a paper web being formed on the screen through the screen and intersticed rollers. 3. In a pa er making machine, the contbination wit a wire screen, of asuction box over. which the screen may be drawn, having a suction area including a plurality of shafts, each; shaft carrying a plurality of difi'erent sized rollers, the rollers on one shaft lying adjacent rollers on another shaft, the difi'erent sized rollers lying in an overla pin relation oneto another with interstlces et'ween the rollers, means for driving a shaft by ower, connections between some of the rol ers and the power driven shaft, whereby certain rollers are power drivento support with minimum friction a screen which may be drawn over the suction box.

4. In a paper making machine, the combination with a wire screen, ofa suction ox over which the screen may be drawn, the suctionbox having a foraminous top suction area including a plurality of rows of shafts, large and small rollers mounted -on the shafts, the rollers being arranged in overlapping engagement with interstices in between, and supports between the ends of the shafts consisting of arms contacting with certain of the small rollers, whereby the shaftswill be held substantially in the desired plane.

5. In a paper making machine, the combination with a suction box, of a foraminous top therefor over Whichawire screen mayibe drawn, side flanges on the top, a rol er spanning the ends of the 'sideflanges for positioning the screen on the flanges, a plurality of different sized rollers mounted in overlapping relation with the screen carrying peripheries of the large rollers in the same plane as the plane of the side flanges, whereby the entire screen will be carried by the rollers as it is drawn over thebox with the exception of narrow edge portions ofthe screen which may contact with the flanges. f

6. Ina paper making machine, the combination with a suction box, of a foraminous top therefor over 'which a wire screen ma be drawn, side flanges on the top, a rclier spanning the ends of the side flanges for positioning the screen on the flanges, and a plurality of rollers mounted with their screen carrying peripheries in the same plane as the plane of the side flanges, and a power drive for the rollers adapted to move all the rollers with which the screen contacts at the same peripheral speed.

7. In a. paper making iachine, the combination with a suction ox, of end walls for the suction box, rollers mounted in the end' contact with the x only across theside wall.

' 8. In a suction box for paper-making machines, he combination with a suction box,

tion of its area upgn the rollers, and will of end and side walls therefor, a; plurality of dilferent sized intermeshed rollers across the top of the box,'the tops of the large rollers which may support a wire screen lying in a plane, the top of the side walls also lying in the same plane as the large roller tops, and the end' walls lying. beneath this v Signed at Rochester, New York this 4th day of Feb. 1924.

JOHN G- JONES. 

